Nestle announced that it is removing artificial flavors and colorings from all of its chocolate candy products — including the dyes used to give the inside of a Butterfinger, like this one, that orange hue. Meredith Rizzo/NPR hide caption

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Some Kraft Macaroni and Cheese will no longer be so ... orange. Matt York/AP hide caption

toggle caption Matt York/AP

Food chemists say that pigments from the purple sweet potato are becoming a "natural" alternative to synthetic food dye. avlxyz /Flickr hide caption

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